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<p>In this paper, a new multi-generation system, incorporating solid oxide fuel cell (SOFC), gas turbine (GT), lithium bromide chiller, gas and heat storage components is proposed to address the issues of volatility in user load and energy source input and mismatching between supply and demand. The dynamic model and control strategy of the system are established, and the system dynamic characteristics in response to solar DNI and external load disturbances are studied. The system can rapidly adjust the key output and input parameters to realize a new supply-demand balance in a shorter period of time by multiple PID control methods. The response processes of two combined cooling, heating and power (CCHP) systems with and without gas storage to cope with load changes are compared. The results show that the CCHP system with gas storage can effectively shorten the response time of load following. The solar collector and the SOFC-GT can reach a new equilibrium within a few tens of seconds under the controller. The response time of the methanol reactor is longer compared to those of solar collector and the SOFC-GT, taking several minutes to stabilize. When the cooling and heating load change, the system can adjust the output to the demand value within 500 and 260 seconds.</p>

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Dynamic Response Characteristics of Multi-Generation System Integrated with Gas and Heat Storage

  • 期刊论文

  • 发表日期：

    2025年4月11日

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  • Xiaomeng Wang,
  • Liqiang Duan,
  • Nan Zheng,
  • Qiushi Wang

摘要

In this paper, a new multi-generation system, incorporating solid oxide fuel cell (SOFC), gas turbine (GT), lithium bromide chiller, gas and heat storage components is proposed to address the issues of volatility in user load and energy source input and mismatching between supply and demand. The dynamic model and control strategy of the system are established, and the system dynamic characteristics in response to solar DNI and external load disturbances are studied. The system can rapidly adjust the key output and input parameters to realize a new supply-demand balance in a shorter period of time by multiple PID control methods. The response processes of two combined cooling, heating and power (CCHP) systems with and without gas storage to cope with load changes are compared. The results show that the CCHP system with gas storage can effectively shorten the response time of load following. The solar collector and the SOFC-GT can reach a new equilibrium within a few tens of seconds under the controller. The response time of the methanol reactor is longer compared to those of solar collector and the SOFC-GT, taking several minutes to stabilize. When the cooling and heating load change, the system can adjust the output to the demand value within 500 and 260 seconds.